重建控制文件
要求：库未mount或open

创建控制文件备份：
alter database backup controlfile to trace;

查看trace位置：
oradebug setmypid;
Statement processed.
oradebug tracefile_name;
或：
show parameter user_dump_dest 




Trace内容如下：




CREATE CONTROLFILE REUSE DATABASE "V11" NORESETLOGS ARCHIVELOG  
MAXLOGFILES 16  
MAXLOGMEMBERS 3  
MAXDATAFILES 100  
MAXINSTANCES 8  
MAXLOGHISTORY 292  
LOGFILE  
GROUP 1 '/oradata/V11/redo01.log' SIZE 50M,  
GROUP 2 '/oradata/V11/redo02.log' SIZE 50M,  
GROUP 3 '/oradata/V11/redo03.log' SIZE 50M  
DATAFILE  
'/oradata/V11/system01.dbf',  
'/oradata/V11/sysaux01.dbf',  
'/oradata/V11/undotbs01.dbf', 
'/oradata/V11/user01.dbf'  
CHARACTER SET WE8MSWIN1252  
;
ALTER TABLESPACE TEMP_TEST ADD TEMPFILE '/oradata/V11/temp01.dbf' reuse;

nomount模式下执行sql即可。